#方式一：
import pytexxx.sendMessage
import pytexxx.receiveMessage

pytexxx.sendMessage.send()
pytexxx.receiveMessage.receive()

#方式二：
from pytexxx import sendMessage
from pytexxx import receiveMessage

sendMessage.send()
receiveMessage.receive()

#方式三：
from pytexxx.sendMessage import send
from pytexxx.receiveMessage import receive

send()
receive()